Dependence of the characteristics of organic solar cells on cathode polymer interface

Increasing energy assumption and rising energy prices in the world forces to
look for energy alternatives, one of the most promising is the photovoltaic energy. Solar
cells made from organic materials are particularly attractive because they are relatively
easy to produce, structurally flexible, and can be applied to large areas at low cost. Fill
Factor is a more sensitive parameter compared to open-circuit voltage (Voc) and shortcircuits
current density (Jsc). This FF depends also on the thickness of the active-polymer
layer, on the morphology of the cathode-polymer interface and on temperature. In this
article, we study the dependence of fill factor (FF) on different parameters in organic
bulk heterojunction solar cells.